WO2011072543A1

WO2011072543A1 - Method and system for updating system messages

Info

Publication number: WO2011072543A1
Application number: PCT/CN2010/077266
Authority: WO
Inventors: 施小娟; 黄亚达
Original assignee: 中兴通讯股份有限公司
Priority date: 2009-12-17
Filing date: 2010-09-25
Publication date: 2011-06-23
Also published as: CN102104855A

Abstract

A method and a system for updating system messages are disclosed in the present invention. The system includes a serving base station and a user equipment (UE). The method includes the following steps: the UE receives the update information of the system messages transmitted from the serving base station, and updates the system messages of the non-main serving component carriers (CC) according to the update information of the system messages. On the premise of the less influence on the power consumption of the UE, the method and the system of the present invention can insure that the UE updates the system messages of the component carriers in time when the UE needs.

Description

Method and system for system message update

Technical field

The present invention relates to the field of mobile communications, and in particular, to a method and system for system message update.

Background technique

In order to provide higher data rates to mobile users, the Long Term Evolution Advance (LTE-A) proposes Carrier Aggregation (CA), which is designed for user equipment with corresponding capabilities ( User Equipment, UE) provides greater bandwidth and increases the peak rate of the UE. In Long Term Evolution (LTE), the maximum downlink transmission bandwidth supported by the system is 20MHz. Carrier aggregation is to aggregate two or more component carriers (CC) to support more than 20MHz and no more than 100MHz. Transmission bandwidth.

The component carriers are classified into backward compatible component carriers and non-backward compatible component carriers according to whether they are compatible with the LTE system. The backward compatible component carrier is compatible with the LTE system, and the UE that does not have the carrier aggregation capability (for the convenience of description, the LTE UE is referred to as the LTE UE for short) is also allowed to access, and the UE with the carrier aggregation capability is also allowed. Referred to as LTE-A UE) access; instead of backward compatible component carriers only allow LTE-A UE access. In addition, for the sake of improving the efficiency of frequency usage and better interference control in heterogeneous networks, it may also be possible to enter a special component carrier, which can only be compatible with backward components. The carrier or the non-backward compatible component carrier is used together, that is, the special component carrier does not allow the UE in the idle state to access, and is only allowed to be allocated to the LTE-A UE that has accessed the backward compatible component carrier or the non-backward compatible component carrier. Used in the connected state.

After the carrier aggregation technology is introduced, the LTE UE that does not have the carrier aggregation capability can reside on only one backward compatible component carrier, whether it is in the idle state or the connected state. (Note that multiple cells may exist on one component carrier. The component carrier here refers to a certain cell on the component carrier, which is convenient for description, referred to as component carrier. The behavior of the LTE UE in the idle state and the connected state is performed according to the provisions of the LTE system, and is not affected. The LTE-A UE with carrier aggregation capability can only reside on one component carrier (backward compatible or non-backward compatible component carrier) in the idle state. After the LTE-A UE successfully accesses the component carrier, That is, establishing radio resource control on the component carrier (Radio) After the connection of the resource control, RRC, the base station can allocate other required component carriers to the UE through dedicated RRC signaling (such as RRC Connection Reconfiguration, RRC connection reconfiguration). Carrier), that is, the LTE-A UE can simultaneously communicate on multiple component carriers in the connected state. Among the multiple component carriers in which the LTE-A UE works in the connected state, the LTE-A UE selects only the E-UTRAN Cell Global Identifier (ECGI) and the tracking area code (Tracking Area) provided on one component carrier. Code, TAC and other information are used as input information for mobility management such as tracking area update of the non-access stratum (NAS), and the physical cell identity (Physical Cell Identity, the frequency provided on the component carrier). The information such as PCI is used as the input information for the security protection of the UE. For convenience of description, the component carrier is referred to as the primary serving component carrier, and the other component carriers are referred to as the non-primary serving component carrier.

The dedicated RRC signaling for allocating the newly added component carrier carries the resource configuration necessary for the UE to perform data transmission on the newly added component carrier, including common resource configuration and dedicated resource configuration. The foregoing common resource configuration is obtained by the UE receiving the system message of the serving cell in the existing LTE system, but the UE does not camp or access on the configured new component carrier before receiving the dedicated RRC signaling. That is, the UE has not obtained the system message on the configured new component carrier, so in order to enable the UE to perform data transmission on the configured new component carrier, the configured new RRC signaling transmits the configured new component carrier. The common resource allocation on the physical uplink shared channel (PUSCH) on the physical uplink shared channel (PUSCH), including the frequency of the newly added component carrier, the bandwidth, the PCI, and the physical downlink shared channel (PDSCH). Common configuration, public configuration of uplink power control, etc. (not here - list all information). The dedicated resource configuration is the dedicated configuration on the PDSCH configured in the existing LTE system, the dedicated configuration on the PUSCH, and the dedicated configuration of the uplink power control (all the information is not listed here).

There are two types of behaviors after the base station and the UE add the above-mentioned new component carrier:

Behavior 1: After the base station and the UE add a new component carrier, the data is transmitted and received on the newly added component carrier, that is, the newly added component carrier is activated after being configured.

Behavior 2: After the base station and the UE add a new component carrier, the data is not immediately sent and received on the newly added component carrier, that is, the base station does not send the service data to the UE on the newly added component carrier. The UE saves the configuration information on the newly added component carrier, and does not send the service data to the base station on the newly added component carrier, and waits for further action of the base station. The subsequent base station can activate the component carrier according to the service requirement. After the component carrier is activated, the base station and the UE can perform data transmission and reception on the component carrier.

In the existing LTE system, the UE monitors the paging message of the serving cell or periodically receives the system information block 1 (SIB1) of the serving cell, according to whether the system message is changed in the paging message or by comparing the newly received SIB1. The system message flag (systemlnfoValueTag) in the system and the systemlnfoValueTag value in the originally received SIB1 saved by the UE determine whether it is necessary to update the system message of the serving cell, that is, re-receive all system messages broadcast by the serving cell. In carrier aggregation, the base station informs the UE of the common resource configuration information on the component carrier by using dedicated RRC signaling. After receiving the common resource configuration information, the UE continues to use the existing LTE system message update mechanism and is configured by monitoring. The paging message on each component carrier or the periodic reception of the SIB1 on each component carrier determines whether it is necessary to update the common resource configuration information on each component carrier, which greatly increases the power consumption of the UE and affects the battery life of the user equipment. .

Summary of the invention

The technical problem to be solved by the present invention is to provide a method and system for system message update, which is to solve the problem that the UE listens to paging messages on all component carriers or periodically receives SIB1 on each component carrier, which greatly increases the power consumption of the UE. problem.

In order to solve the above technical problem, the present invention provides a system message update method, including: a user equipment (UE) receives system message update information sent by a serving base station, and updates a system message of a non-main service component carrier according to the system message update information. .

The above method may further include: the serving base station notifying the UE to update a system message of the non-primary service component carrier by transmitting system message update information to the UE.

The above method can also have the following characteristics:

The system message update information is an indication of a system message change,

The step of the serving base station notifying the UE to update a system message of a non-primary service component carrier by sending system message update information to the UE includes: the serving base station adopting a dedicated radio resource Control (RRC) signaling carries an indication of the change of the system message, and notifies the UE to update a system message of one or more non-primary service component carriers;

The step of the UE updating the system message of the non-primary service component carrier according to the system message update information includes: the UE receiving the one or more non-main service component carriers according to the received indication of the system message change System message on.

The above method can also have the following characteristics:

The non-primary service component carrier is an activated component carrier or an inactive component carrier.

The above method can also have the following characteristics:

The indication of the system message change is an indication that the UE is notified to update only system message block 2 (SIB2);

Receiving, in the step of receiving, the system message on the one or more non-primary service component carriers, the SIB2 on the one or more non-primary service component carriers in the UE according to the received indication of the system message change .

The above method may further include:

Sending, by the UE, feedback information to the serving base station according to a system message update result, where the information indicating that the UE successfully receives the non-primary service component carrier of the system message, and/or the UE not successfully receiving the system message is not included in the feedback information. Information of the primary service component carrier.

The above method can also have the following characteristics:

The step of the UE updating the system message of the non-primary service component carrier according to the system message update information includes: the UE does not update the system message of the inactive non-primary service component carrier until receiving the activation sent by the serving base station The activation indication of the non-primary service component carrier begins to update the system message of the non-primary service component carrier.

The above method can also have the following characteristics:

The system message update information is identifier information of a system message,

The step of the serving base station notifying the UE to update the system message of the non-primary service component carrier by sending the system message update information to the UE includes: when the serving base station activates the non-primary service component carrier, sending an activation indication to the UE, The activation indication carries the non-primary service component carrier Identification information of the system message;

The step of the UE updating the system message of the non-primary service component carrier according to the system message update information includes: determining, by the UE, whether the received identifier information of the system message and the locally saved identifier information are consistent, if not, Receiving a system message on the non-primary service component carrier.

The above method can also have the following characteristics:

The identifier information of the system message is a system message flag, or is a basic system message flag; the basic system message flag is identification information indicating whether a main information block (MIB), system message block 1 (SIB1), and SIB2 are changed, or The basic system message flag is identification information indicating whether the SIB2 is changed.

The above method can also have the following characteristics:

The system message update information is information of a system message that needs to be updated,

The step of the serving base station notifying the UE to update the system message of the non-primary service component carrier by sending the system message update information to the UE includes: when the serving base station activates the non-primary service component carrier, sending an activation indication to the UE, The activation indication carries information of a system message that the UE needs to update;

The step of the UE updating the system message of the non-primary service component carrier according to the system message update information includes: the UE replacing the locally stored non-primary service component carrier with the received information of the system message that needs to be updated. system information.

The above method can also have the following characteristics:

The step of the serving base station notifying the UE to update the system message of the non-primary service component carrier by sending the system message update information to the UE includes: when the serving base station activates the non-primary service component carrier, sending an activation indication to the UE, The step of instructing to carry the system message change; the step of the UE updating the system message of the non-primary service component carrier according to the system message update information includes: the indication that the UE changes according to the received system message Receiving a system message on the non-primary service component carrier.

The above method may further include: The UE feeds back an activation completion indication to the serving base station according to the system message update result, where the information indicating that the UE successfully receives the non-primary service component carrier of the system message in the activation completion indication, and/or the UE does not successfully receive the system message Information about the non-primary service component carrier.

In order to solve the above technical problem, the present invention provides a system for system message update, including a serving base station and a UE belonging to the serving base station.

The serving base station is configured to: notify the UE to update a system message of a non-primary service component carrier by sending system message update information to the UE;

The UE is configured to: receive the system message update information, and update a system message of the non-primary service component carrier according to the system message update information.

The above system can also have the following characteristics:

The serving base station is configured to: carry the indication of the system message change by using dedicated RRC signaling, and notify the UE to update one or more system messages of the non-main service component carrier;

The UE is configured to: receive a system message on the one or more non-primary service component carriers according to the received indication of the system message change.

The above system can also have the following characteristics:

The serving base station is configured to: when the non-primary service component carrier is activated, send an activation indication to the UE, where the activation indication carries the system message update information.

The above system can also have the following characteristics:

The system message update information is identifier information of a system message, information of a system message that needs to be updated, or an indication of a system message change;

When the system message update information is the identifier information of the system message, the UE is configured to: determine whether the received identifier information of the system message is consistent with the locally saved identifier information, and if not, receive the non- System message on the primary service component carrier;

When the system message update information is information of a system message that needs to be updated, the UE is configured to: receive the information of the system message that needs to be updated, and replace the local storage by using the received information of the system message that needs to be updated. System message of the non-primary service component carrier;

When the system message update information is an indication of a system message change, the UE is set to: Receiving a system message on the non-primary service component carrier according to the received indication of the system message change.

The method and system for updating the system message provided by the present invention can ensure that the UE updates the system message on the component carrier as needed when the UE consumes less power. BRIEF abstract

1 is a schematic diagram of a component carrier configuration of a UE;

2 is a flowchart of updating, by the UE, a system message on a non-primary service component carrier according to an indication of a serving base station;

3 is a flow chart of the UE updating the system message on the CC1 according to the indication of the serving base station;

4 is a flow chart of the UE updating the system message on CC1 according to the indication of the serving base station. Preferred embodiment of the invention

In the present invention, the serving base station notifies the UE to update the system message of the non-primary service component carrier by transmitting system message update information to the UE; the UE receives the system message update information, and updates the non-master according to the system message update information. System message serving the component carrier.

Specifically, system message updates can be implemented in two ways:

Method 1: Use dedicated RRC signaling:

The system message update information is an indication of a system message change, and the method specifically includes: the serving base station, by using dedicated RRC signaling (such as an RRC connection reconfiguration message), carrying an indication of the system message change, notifying the UE to update System messages of one or more non-primary service component carriers;

And receiving, by the UE according to the received indication of the change of the system message, a system message on the one or more non-primary service component carriers, thereby updating the locally stored system message. The non-primary service component carrier is an activated component carrier or an inactive component carrier. The indication of the system message change carries the identifier information of the non-primary service component carrier, or the absolute carrier frequency information of the non-primary service component carrier.

The serving base station transmits the dedicated RRC signaling carrying an indication of a system message change on the primary serving component carrier, or transmitting the dedicated RRC signaling carrying the indication of the system message change on the activated non-primary service component carrier.

The indication of the system message change is to notify the UE to update a system message master information block (MIB), system message block 1 (SIB1) and SIB2 on the non-primary service component carrier, or to update only the indication of the SIB2;

Receiving, by the UE according to the received indication of the change of the system message, the MIB, SIB1 and SIB2 on the one or more non-primary service component carriers, updating the locally stored MIB, SIB1 and SIB2; or receiving only the one The SIB2 on the plurality of non-primary service component carriers updates the locally stored information of the SIB2.

Preferably, the UE does not update the locally stored system message of the non-primary service component carrier, and does not start to update the local storage until receiving the activation indication sent by the serving base station to activate the non-primary service component carrier. System message for non-primary service component carrier.

Manner 2: The way the serving base station uses the activation indication:

Specifically, the system indication update information is carried in the activation indication, and the system message update information may be an identifier information of the system message, or information of a system message that needs to be updated, or an indication of a system message change.

When the system message update information is the identifier information of the system message, the method specifically includes:

When the serving base station activates the non-primary service component carrier, sending an activation indication to the UE, where the activation indicates identifier information of a system message carrying the non-primary service component carrier; And determining, by the UE, whether the received identifier information of the system message is consistent with the locally stored identifier information, and if not, receiving a system message on the non-primary service component carrier, thereby updating the locally stored system message.

The identifier information of the system message is a system message flag, or is a basic system message flag; the basic system message flag is identifier information indicating whether the MIB, SIB1, and SIB2 are changed, or the basic system message flag indicates whether the SIB2 is changed. Identification information;

Receiving, by the UE, the MIB, SIB1 and SIB2 on the non-primary service component carrier according to the received system message flag or the basic system message flag, and updating the locally stored MIB, SIB1 and SIB2; or receiving only the non-primary service SIB2 on the component carrier, and update the information of the SIB2 stored locally.

The system message update information is information of a system message that needs to be updated, and the method specifically includes:

When the serving base station activates the non-primary service component carrier, sending an activation indication to the UE, where the activation indication carries information about a system message that the UE needs to update;

The UE receives the information of the system message that needs to be updated, so as to replace the locally stored system message of the non-main service component carrier with the received information of the system message that needs to be updated.

The system message update information is an indication that the system message is changed, and the method specifically includes: when the serving base station activates the non-primary service component carrier, sending an activation indication to the UE, where the activation indication carries an indication that the system message is changed;

And receiving, by the UE according to the received indication of the change of the system message, a system message on the non-primary service component carrier, thereby updating the locally stored system message.

The UE feeds back an activation completion indication to the serving base station according to the system message update result, where the information indicating that the UE successfully receives the non-primary service component carrier of the system message in the activation completion indication, and/or the UE does not successfully receive the system message Information about the non-primary service component carrier. A system for updating a system message according to an embodiment of the present invention includes a serving base station and a UE belonging to the serving base station, The serving base station is configured to notify the UE to update a system message of a non-primary service component carrier by sending system message update information to the UE;

The UE is configured to receive the system message update information, and update a system message of the non-primary service component carrier according to the system message update information.

Preferably, the serving base station is configured to carry an indication of the system message change by using dedicated RRC signaling, and notify the UE to update a system message of one or more non-primary service component carriers; the UE is configured to receive according to the received And receiving, by the indication of the system message change, a system message on the one or more non-primary service component carriers.

Preferably, when the serving base station is configured to activate the non-primary service component carrier, send an activation indication to the UE, where the activation indicates the in-service system message update information.

Preferably, when the serving base station is configured to activate the non-primary service component carrier, send an activation indication to the UE, where the activation indicates identification information of a system message carrying the non-primary service component carrier; Whether the identification information of the system message and the locally stored identification information are consistent, and if not, the system message on the non-primary service component carrier is received.

Preferably, when the serving base station is configured to activate the non-primary service component carrier, send an activation indication to the UE, where the activation indication carries information about a system message that the UE needs to update; and the UE is configured to receive the update that needs to be updated. The information of the system message replaces the locally stored system message of the non-primary service component carrier with the received information of the system message that needs to be updated.

Preferably, when the serving base station is configured to activate the non-primary service component carrier, send an activation indication to the UE, where the activation indication carries an indication that the system message is changed; the UE is configured to change according to the received system message. And receiving an indication of the system message on the non-primary service component carrier.

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Embodiment 1

The user equipment UE is an LTE-A UE with carrier aggregation capability, and takes a Frequency Division Duplex (FDD) as an example. As shown in FIG. 1, component carrier 2 (downlink frequency is £2, uplink frequency point) For £2'), CC2 (DL £2, UL f2' for short) is the main service of the UE. The component carrier, the UE obtains the common resource configuration information on the CC2 by reading the system message on the CC2, and obtains the dedicated resource configuration information on the CC2 through the RRC connection reconfiguration message. The service base station allocates two new component carriers, component carrier 1 and component carrier 3, namely CCl (DL fl , UL fl' ) and CC3 ( DL G , for the LTE-A UE through dedicated RRC signaling. UL β,), the dedicated RRC signaling carries the resource configuration necessary for the UE to perform data transmission on CCl and CC3, including common resource configuration and dedicated resource configuration.

The CC2 is the primary serving component carrier of the UE. The UE listens to the paging message sent by the serving base station on the CC2 on the CC2, or periodically detects the SIB1 on the CC2 to update the system message on the CC2, that is, the UE according to the paging message. Whether the system message is changed or the systemInfo value of the service cell is updated by comparing the systemlnfoValueTag in the newly received SIB1 with the systemInfofoValueTag value in the originally received SIB1 saved by the UE (the specific update method is prior art, this The invention patent will not be described again).

In this embodiment, the UE updates the system message on the non-primary service component carrier according to the indication of the serving base station, and the specific process is as shown in FIG. 2:

5201. The serving base station needs to change system messages on CCl and CC3, and the serving base station notifies the UEs that CC1 and CC3 change the system message.

The serving base station notifies the UE of the system message change on CC1 and CC3 by using dedicated RRC signaling (such as the RRC connection reconfiguration message), and needs to carry an indication indicating the component carriers CC1 and CC3 in the indication of the system message change, which may be a component carrier. The identification information, or the absolute carrier frequency information of the component carrier; specifically, the identifier of each CC allocated by the base station to the UE, for example, the identifier of CC1 is 1, the identifier of CC3 is 3, and the absolute carrier frequency of CC1 and CC3 may also be (ARFCN).

The base station sends an indication of the system message change to the UE on the primary serving component carrier CC2, or if the current UE and the base station are transmitting and receiving data in CC1 and CC3, that is, CC1 and CC3 are in an active state, the base station may also be in CC1 or CC3. The UE sends an indication of a system message change.

It should be noted that, in this embodiment, it is assumed that the system messages on CC1 and CC3 need to be modified at the same time. If only one system message on the CC needs to be modified at a certain time, the serving base station only needs to notify the UE of the system message on the CC. change.

5202. After receiving the indication of the system message change on the CCl and the CC3, the UE starts to receive and read. Take the system message master information block (MIB), SIB1, SIB2 on CC1 and CC3.

It should be noted that the downlink bandwidth of the component carrier included in the MIB, the system frame number (SFN), and the Physical Hybrid ARQ Indicator Channel (PHICH) configuration information, which generally do not change; SIB1 includes the UE. The scheduling information required for receiving other system messages (such as SIB2), the scheduling information is generally not changed, and the information required for the UE to transmit data in the connection state is not included; SIB2 includes the UE transmitting data in the connected state. The public configuration information required, which may change. Therefore, in step S201, the serving base station notifies the UE that the system message is changed, and may indicate that the UE only changes the system message in the SIB2. After receiving the indication, the UE may directly receive and read the information in the SIB2, and does not need to The MIB and SIB1 are received to ensure that the UE quickly updates the modified public configuration information.

S203. The UE sends feedback information to the serving base station according to the system message update result, to notify the service base station system that the message reception is completed.

The UE notifies the serving base station system that the message reception is completed by using dedicated RRC signaling (e.g., RRC Connection Reconfiguration Complete message).

If the UE successfully receives and reads the system messages on CC1 and CC3 within the time specified by the system, the UE notifies the serving base station system that the message reception is completed, and the system message receiving completion indication indicates that the UE successfully receives the systems on CC1 and CC3. Message.

If the UE does not successfully receive the system message on the CC1 and/or the CC3 within the time specified by the system, the UE carries the information of the component carrier that has successfully received the system message, or carries The information of the component carrier that does not successfully receive the system message may be carried by the component carrier identifier that represents the component carrier, or the ARFCN that represents the component carrier of the component carrier. Or if the UE does not successfully receive the system message on CC1 and CC3 within the specified time of the system, the UE indicates that the system message reception fails in the indication that the service base station system message is completed.

The above system message is MIB and SIB1 and SIB2, or only SIB2, according to the description of step S202.

The UE notifies the serving base station system that the message reception is completed on the primary service component carrier, or if the current UE and the base station are performing data transmission and reception on CC1 and CC3, that is, CC1 and CC3 are in an active state, then The UE may also select CCl (if the system message is successfully received) or CC3 (if the system message is successfully received) to notify the serving base station that the message reception is completed.

It should be noted that this step is an optional step. Regardless of whether the UE successfully receives the system message on CC1 and CC3, the UE may not feed back any information to the serving base station, if the UE does not successfully read the component carrier. The system message, that is, the common resource configuration information on a certain component carrier is not updated, and the base station can judge that the base station and the UE cannot be on the component carrier by using technologies (such as measurement report, channel quality indicator, and radio link failure detection). Normal communication is performed to take further measures such as deleting the component carrier, deactivating the component carrier, and the like.

In this embodiment, the component carriers CC1 and CC3 may be activated component carriers, or may be component carriers configured but not activated by the serving base station.

Embodiment 2

The user equipment UE is an LTE-A UE with carrier aggregation capability. Taking FDD as an example, the serving base station currently configures two component carriers for the UE, component carrier 1 CC1 (DL fl , UL fl ' ) and component carrier 2 CC 2 ( DL £2, UL G'). The component carrier 2 is the primary serving component carrier of the UE, and the UE obtains the common resource configuration information on the CC2 by reading the system message on the CC2, and obtains the dedicated resource configuration information on the CC2 through the RRC connection reconfiguration message; the component carrier 1 is a non-primary service component carrier, and the serving base station configures the common resource configuration and the dedicated resource configuration on the component carrier 1 for the UE through dedicated RRC signaling, but the serving base station does not activate the component carrier 1, ie, the UE, because there is no service requirement. The serving base station currently only performs service communication on the component carrier 2, and the component carrier 1 is an inactive component carrier, and the UE and the base station do not perform service communication on the component carrier.

The CC2 is the primary serving component carrier of the UE. The UE listens to the paging message sent by the serving base station on the CC2 on the CC2, or periodically detects the SIB1 on the CC2 to update the system message on the CC2, that is, the UE according to the paging message. Whether to indicate the system message change or to compare whether the systemInfofoValueTag in the newly received SIB1 and the systemInfofoValueTag value in the originally received SIB1 saved locally by the UE determine whether the system message of the serving cell needs to be updated.

CC1 is currently a non-active component carrier, the UE does not update the system message on CC1 until CC1 is activated by the serving base station, and the UE updates the system message on CC1 according to the indication of the serving base station. Figure 3 shows:

5301. The serving base station configures CC1 for the UE by using dedicated RRC signaling but does not activate CC1. The dedicated RRC signaling carries the common resource configuration on CC1, the dedicated resource configuration and the system message flag (systemlnfoValueTagl) on CC1 when CC1 is configured. The UE saves the above information but does not activate CC1.

5302. The UE does not update the system message on the CC1 when the configuration information on the S301CC1 is received until the CC1 is activated by the serving base station, that is, the UE does not monitor the paging message on the CC1, and does not periodically detect the SIB1 on the CC1.

Since CC1 is in an inactive state, the UE and the serving base station do not perform traffic transmission on CC1, so the UE does not need to update the system message on CC1.

S303. The serving base station activates CC1 according to the service requirement, and carries the system message flag (systemInfoValueTag2) on the current CC1 in the activation indication.

The serving base station notifies the UE to activate CC1 on the primary serving component carrier CC2.

S304. The UE determines, according to the identifier information (for example, the system message flag systemInfoValueTagl) of the system message received and saved in the S301, and the identifier information of the system message (for example, systemInfoValueTag2) that is received when the activation indication is received, to determine that the UE needs to update the CC1. system information.

The specific judgment is based on: ^The system informationValueTag2 is equal to the systemlnfoValueTagl, then the system message on the CC1 is not required to be updated, and the UE directly feeds back the activation success indication to the serving base station; if the systemInfoValueTag2 and the systemlnfoValueTagl are not equal, the system message on the CC1 needs to be updated. In the embodiment, systemInfoValueTag2 is not equal to systemlnfoValueTagl.

It should be noted that, this embodiment assumes that S304 activates CC1 for the first time after configuring CC1 for the serving base station. If CC1 is activated before, the UE may update the system message on CC1 in the state of CC1 activation, where The systemInfoValueTagl is the system message flag obtained when the UE last updated the system message on CC1.

It should be noted that, because the public resource configuration information required for the UE to update the non-primary service component carrier for data communication in the connected state only needs to acquire the MIB, SIB1 and SIB2, and is independent of other system information blocks, so the optimized service base station can Add a characterizing MIB to SIB1, SIB1 Or the flag of whether SIB2 changes, for convenience of description, the patent of the present invention is called a basic system message flag. Correspondingly, the flag sent by the serving base station in S301 and S303 is the basic system message flag of CC1 at two time points, and the UE compares the basic system message flag stored locally and the basic system message flag received in the activation indication. , judging whether it is necessary to update the system message on CC1, and judging according to the above judgment according to the system message flag.

It should be noted that, according to the prior art, if the UE reads and saves the system message for more than 3 hours, the saved system message will be automatically invalidated. Therefore, in this embodiment, if the UE receives the system message flag in S303, it is saved locally. The system message (common resource configuration information) has expired, and the UE does not need to compare stemInfoValueTag2 with systemlnfoValueTagl to directly read the system message on CC1.

Further optimized, as described in the first embodiment, because the information in the MIB generally has little change in the scheduling information in the MIB, the basic system message flag may further be only a flag indicating whether the SIB2 changes.

5305. The UE reads the system messages MIB, SIB1, and SIB2 on CC1, or according to the optimization method described in S304, the UE reads SIB2 on CC1.

5306. The UE feeds back an activation completion indication to the serving base station.

If the UE successfully receives and reads the system message on CC1 within the time specified by the system, the UE feeds back the activation completion indication to the serving base station, where the activation completion indication indicates that the UE successfully received the system message on CC1.

If the UE does not successfully receive the system message on CC1 within the time specified by the system, the UE notifies the serving base station that the UE does not successfully receive the system message on CC1 in the above activation completion indication, or if the serving base station activates more in S302. The component carrier, the UE notifies the serving base station UE that the component carrier information of the system message is successfully received in the activation completion indication, or the component carrier information that the UE does not successfully receive the system message, or the component carrier information that the UE successfully receives the system message and The component carrier information of the system message was not successfully received.

Embodiment 3

The user equipment UE is an LTE-A UE with carrier aggregation capability. Taking FDD as an example, the UE currently works on two component carriers, component carrier 1 CC1 (DL fl , UL fl' ) and component carrier 2 CC2 (DL f2, UL f2'). Where component carrier 2 is the primary serving component carrier of the UE; component carrier 1 is a non-primary serving component carrier and is activated.

The UE updates the system message on CC1 by using the method described in Embodiment 1, and the serving base station records the system message flag of the UE currently on CC1 when CC1 is successfully deactivated, and then the UE does not update the system message on CC1 until CC1 again. Activated by the serving base station, the specific process is shown in Figure 4:

5401. The UE updates the system message on the CC1 by using the method in Embodiment 1.

In this embodiment, it is assumed that the system message flag acquired by the UE from SIB1 when the UE first updates the system message in the CC1 activation state is systemlnfoValueTagl.

In the second embodiment, the serving base station may add a basic system message flag indicating whether the MIB, SIB1 or SIB2 is changed in the SIB1; further optimized, the basic system message flag may also be a basic system that only indicates whether the SIB2 is changed. Message sign.

5402. The serving base station deactivates CC1.

The serving base station deactivates CC1 due to a decrease in traffic, or a deterioration in CC1 signal quality.

S403: After deactivating CC1 according to the instruction of S402, the UE feeds back a deactivation completion indication to the serving base station.

After receiving the deactivation completion indication of the UE, the serving base station records the system message flag currently being used by the UE on CC1 (or optimized as the basic system message flag), that is, the system when the UE last updates the system message on CC1 in the CC1 activation state. Message flag (or optimized for basic system message flags).

5404. The UE does not update the system message on CC1 when CC1 is deactivated by the serving base station to be activated by the serving base station, that is, the UE does not monitor the paging message on CC1, and does not periodically detect SIB1 on CC1.

Since CC1 is in an inactive state, the UE and the serving base station do not perform traffic transmission on CC1, so the UE does not need to update the system message on CC1. 5405. The serving base station activates CC1 again according to the service requirement.

When the serving base station activates CC1, it judges that the UE saves according to the system message flag or the basic system message flag on the current CC1 (for convenience of description, this system is identified by systemInfoValueTag2), and the system message flag or basic system message flag recorded by S403. Whether the system message (common resource configuration) on CC1 needs to be updated. The specific judgment is based on the fact that if systemlnfoValueTagl is equal to systemInfoValueTag2, no update is required; if systemlnfoValueTagl is not equal to systemInfoValueTag2, it needs to be updated. In this embodiment, the systemInfoFValueTagl is not equal to the systemInfoValueTag2, so the serving base station carries the common resource configuration information (that is, the information of the system message that needs to be updated) that needs to be updated on the CC1 in the activation indication, or the serving base station instructs the UE to update the CC1 in the activation indication. system information.

5406. The UE activates CC1, and feeds back an activation completion indication to the serving base station.

For example, the public resource configuration information that needs to be updated in the activation indication is taken as an example, and the UE can directly replace the locally stored common resource configuration information by using the received common resource configuration information. If the UE is instructed to update the system message on CC1, the behavior of the UE after receiving the activation indication is the same as steps S305-S306.

While the preferred embodiments of the present invention have been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the invention should not be limited to the embodiments described above.

One of ordinary skill in the art will appreciate that all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Industrial applicability

The method and system for updating the system message provided by the present invention can ensure that the UE updates the system message on the component carrier as needed when the UE consumes less power.

Claims

Claim

1. A method for updating a system message, comprising:

The user equipment (UE) receives the system message update information sent by the serving base station, and updates the system message of the non-primary service component carrier according to the system message update information.

2. The method according to claim 1, further comprising: the serving base station notifying the UE to update a system message of a non-main service component carrier by transmitting system message update information to the UE.

3. The method of claim 2, wherein the system message update information is an indication of a system message change;

The step of the serving base station notifying the UE to update a system message of a non-primary service component carrier by transmitting system message update information to the UE includes: the serving base station carrying the system by using dedicated radio resource control (RRC) signaling An indication of a message change, informing the UE to update a system message of one or more non-primary service component carriers;

4. The method of claim 3, wherein

5. The method of claim 3, wherein

6. The method of claim 3, further comprising:

Sending, by the UE, feedback information to the serving base station according to a system message update result, where the The information of the non-primary service component carrier indicating the UE successfully receiving the system message in the feed information, and/or the information of the non-main service component carrier that the UE has not successfully received the system message.

7. The method of claim 1, wherein

8. The method according to claim 2, wherein the system message update information is identification information of a system message;

The step of the serving base station notifying the UE to update the system message of the non-primary service component carrier by sending the system message update information to the UE includes: when the serving base station activates the non-primary service component carrier, sending an activation indication to the UE, The activation indicates identification information of a system message carrying the non-primary service component carrier;

9. The method of claim 8 wherein

10. The method of claim 2, wherein the system message update information is information of a system message that needs to be updated;

The step of the serving base station notifying the UE to update the system message of the non-primary service component carrier by sending the system message update information to the UE includes: when the serving base station activates the non-primary service component carrier, sending an activation indication to the UE, The activation indication carries information of a system message that the UE needs to update; The step of the UE updating the system message of the non-primary service component carrier according to the system message update information includes: the UE replacing the locally stored non-primary service component carrier with the received information of the system message that needs to be updated. system information.

11. The method of claim 2, wherein the system message update information is an indication of a system message change;

The method according to any one of claims 8 to 11, further comprising: the UE feeding back an activation completion indication to the serving base station according to a system message update result, where the activation completion indication indicates that the UE successfully receives Information to the non-primary service component carrier of the system message, and/or information of the non-primary service component carrier to which the UE did not successfully receive the system message.

13. A system for system message update, comprising a serving base station and a user equipment (UE) belonging to the serving base station,

14. The system of claim 13 wherein

15. The system of claim 13 wherein

The system according to claim 15, wherein the system message update information is identification information of a system message, information of a system message to be updated, or an indication of a system message change;

When the system message update information is an indication of a system message change, the UE is configured to: receive a system message on the non-primary service component carrier according to the received indication of the system message change.